His intake of fat is about 55% of his total calories and his total calories are 2538. He's in his late fifties, already at a good weight, and healthily active.

While I don't eat added fats (oil, butter, etc.), and I eat lean cuts of meat (generally, with salmon being about my fattiest protein source) I've tracked my personal eating plan, and I easily get 40-55% of my calories from fat. I do eat an avocado almost every day, so that definitely helps. I eat about half the calories Mark does, but I'm female, currently trying to cut weight, and not healthily active.

And just as an aside, a tablespoon of Kerrygold butter has 11 gm fat, 0 protein, and 0 carbs. It has 10% of the vitamin A you need based on a 2000 cal/day diet. I'd really rather get my fats from good old nutritive food. But if I wanted if I wanted to gain weight, I guess a big old slab of that on something would be fine.

When I was in college (a long time ago) I worked for a woman whose mom used to freeze sticks of butter and give them to her and her siblings for snacks in the summer. She was a very petite and healthy woman. Once in a while I wonder if my kids would like that snack. I always talk myself out of it

I tried it when i had nothing else to eat once Has a hard consistence so you can nibble on it. I actually liked it... but I would prefer a creamy icecream in the summer hehe.